BCH Codes for Coherent Star DQAM Systems with Laser Phase Noise

BCH Codes for Coherent Star DQAM Systems with Laser Phase Noise Abstract Coherent optical systems have relatively high laser phase noise, which affects the performance of forward error correction (FEC) codes. In this paper, we propose a method for selecting Bose–Chaudhuri–Hocquenghem (BCH) codes for coherent systems with star-shaped constellations and M -ary differential quadrature amplitude modulation (DQAM). Our method supports constellations of any order M which is a power of 2, and includes differential M -ary phase shift keying as a special case. Our approach is straightforward, requiring only short pre-FEC simulations to parameterize a statistical model, based on which we select codes analytically. It is applicable to pre-FEC bit error rates (BERs) of around 10 −3 . We evaluate the accuracy of our approach using numerical simulations. For a target post-FEC BER of 10 −5 , codes selected with our method yield BERs within 2× target. Lastly, we extend our method to systems with interleaving, which enables us to use codes with lower overhead. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Optical Communications de Gruyter

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Publisher
de Gruyter
Copyright
Copyright © 2017 by the
ISSN
0173-4911
eISSN
2191-6322
DOI
10.1515/joc-2016-0002
Publisher site
See Article on Publisher Site

Abstract

Abstract Coherent optical systems have relatively high laser phase noise, which affects the performance of forward error correction (FEC) codes. In this paper, we propose a method for selecting Bose–Chaudhuri–Hocquenghem (BCH) codes for coherent systems with star-shaped constellations and M -ary differential quadrature amplitude modulation (DQAM). Our method supports constellations of any order M which is a power of 2, and includes differential M -ary phase shift keying as a special case. Our approach is straightforward, requiring only short pre-FEC simulations to parameterize a statistical model, based on which we select codes analytically. It is applicable to pre-FEC bit error rates (BERs) of around 10 −3 . We evaluate the accuracy of our approach using numerical simulations. For a target post-FEC BER of 10 −5 , codes selected with our method yield BERs within 2× target. Lastly, we extend our method to systems with interleaving, which enables us to use codes with lower overhead.

Journal

Journal of Optical Communicationsde Gruyter

Published: Jun 27, 2017

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